How can I use the Windows 7 PlayTo feature to play videos from under-downloaded torrents or websites?

Question

Windows

I purchased a WD TV Live Hub media player. It is recognized as a media server on the network, and the PlayTo item appeared in the context menu of media files in Windows 7. Incl. now any movie/mp3 file can be sent to the media player for playback without copying it directly to the player's hard drive.
Question 1: Is it possible to somehow send video to the player, say, from flash / html5 players on sites?
Question 2: Is there some kind of torrent client that allows you not to download the video to the end, but immediately send it as a video stream for playback on mediaserver (and download during playback).

Answer 1

Regarding sequential downloads - www.qbittorrent.org/
can download sequentially, I watch it myself, but I don’t know how it will dance with PlayTo